Airfoil Dampers

Airfoil2

Air Systems Airfoil Dampers

Airfoil Dampers can be built to fit any shape and size air system. Our experience and field research has provided us with the tools and knowledge necessary to build airfoil dampers to any unique set of criteria. Airfoil Dampers are ideal volume control and low leakage applications and are particularly suited to produce less turbulence and noise.

Applications

  • Volume Control
  • Shut Offl

Shape

  • Round
  • Square / Rectangular

Blade Operation

  • Opposed
  • Parallel

Frame

  • 8″ deep frame standard, 6, 10, 12, other available
  • 16, 14, 12 gauge material
  • Alumunized, Galvanized, Stainless Steel, Other
  • 8″ Face to Face is typical
  • Punched or Blind Flange

Temperature Range (Materials Selected by Applications)

  • 70 – 1200° F
  • Galvanized 70° – 300° F
  • Aluminized 70° – 750° F
  • Stainless Steel 70° – 1150° F

Linkage

  • Mechanical: Plated A 36 Steel – 3/16″ x 1″ bar stock, crank arm welded to shaft

Shafts

  • Continuous full length shaft standard, Stub full length available
  • Cadmium Plated 1036 Carbon Steel or 304/304L Stainless Steel (SS) – up to 2″ available

Bearings

  • Sintered Bronze Pressed in Frame (PIF)
  • Stainless Steel Pressed in Frame (PIF)
  • Bolted Flange Block Ball Bearing (Standard on Automatic Dampers)
  • Nitronic High Temp Bushing (Standard for Dampers above 900 F)

Extended Shafts

  • Typically not required for less than 120° F
  • 120 – 1200° F Extended from Frame up to 8″
  • Extended up to 18″ per customer request

Shaft Seals

  • Adjustable Grafoil Packing Gland integral with frame
  • Outboard for Extended Shafts
  • Neoprene Wiper Type Gasket (for automated dampers) – up to 200° F airstream
  • Outboard when used with extended shafts

Blade Seals

  • Vinyl (low temp) or Stainless Steel (high temp)
  • Jamb Seals (Stainless Steel)

Manual Actuators

  • Hand Locking Quadrant
  • Worm Gear

Automatic Actuators

  • Electric (Open/Closed or Modulating 1-10/4-20 mA)
  • 24-220 VDC; 120-220-440 1Φ/3Φ AC
    • Spring Return
    • Electronic Failsafe
    • NEMA 4 – NEMA 6/7
  • Pneumatic (Open/Closed or Modulating 3-15 PSI)
  • Operators: Rack & Pinion, Vane, Linear, Diaphragm
    • Double Acting
    • Spring Return
 
 

Verification